>How much easier is it to keep a job, and thus your health insurance, as a SWE when your body breaks down?

Probably much easier than it would be for a warehouse worker. Though I have no idea how this is relevant to what was said in the message you were replying to.

I'm just pointing out that while it's great that they get pretty decent health insurance, it's a poor substitute for a societal safety net. And for a union that makes sure they're not chewed up and spit out.